McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams
Pursue Your Passion
Rainier Arms, LLC

Rainier Arms UltraMatch Billet Ambi Lower Receiver MOD 3 -W/O QD

Rainier Arms UltraMatch Billet Ambi Lower Receiver MOD 3 -W/O QD

Availability: In stock




Mod 3 Lower without QD. Compatible with PDW Stock

Our billet sets are CNC machined from solid billet 7075-T6 aluminum which is 70% stronger than the commonly used 6061 aluminum and finished with milspec hardcoat anodize to a surface hardness of 60 Rockwell. We have designed our lowers with an ambidextrous mag release and bolt release with extended latch for smoother deployment. The precision machining on our billets lowers will line up perfectly to our Rainier Arms UltraMatch Billet Upper Receiver or any other billet uppers out there.


  • Ambidextrous Extended Bolt Release
  • Ambidextrous Magazine Release
  • 7075 Billet Aluminum
  • Flared Magwell
  • Integrated Trigger Guard
  • Tensioning Screw for proper Upper/Lower Fit
  • Compatible with 45° safety selector levers

FFL Required Before Shipping.

Please have your dealer email their license to or they can also fax it in. Please give us a few days to process the information.

Additional Info

Additional Info

Manufacturer Rainier Arms, LLC
Finish No
Barrel Length No
Caliber No
Configuration No
Option No
Gas Length No
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No


Customer Reviews (6)

No commentReview by Alex
- (Posted on 12/27/2016)
Ambi lower for lefty!Review by Chuck
This has to be one of the best ambi lowers out there for us lefties; quality is second to none. A solid 9/10 on the awesome scale. It works well with every magazine I tried, all dropped freely. The lower parts went in without any fuss. Daniel Defense and Stag uppers matched perfectly. Having said that, I have two complaints.

First, the design and shape of the magazine release lever on the left side of the lower. It has a pointy protrusion where your left finger makes contact with the paddle lever and after about 10-12 magazine dumps your finger gets a little sore. I think a rectangular design would have been best.

Last, I wish that Rainer Arms manufactured a bolt catch and magazine release button to purchase that matched the pattern of the included ambi bolt catch and magazine release lever. V-Seven and Seekins parts didn't match as well as I'd hoped. Given this fix, I would rate this lower a 10/10 on the awesome scale. (Posted on 11/30/2016)
No commentReview by Christopher
- (Posted on 11/23/2016)
No commentReview by Aaron
- (Posted on 11/22/2016)
No commentReview by Stephen
- (Posted on 8/3/2016)
No commentReview by Matthew
Great ambi lower. Very similar to the other San Tan lowers I have but wanted one without the QD slings cups in case I ever wanted to go with a PDW stock. No complaints. (Posted on 5/28/2016)

Write Your Own Review

Only registered users can write reviews. Please, log in or register

You may also be interested in the following product(s)